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0. D. ORVIS.

STEAM GENERATOR.

No. 308.429. Patented Nov. 25, 1884..

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STEAM GENERATOR.

(No Model.)

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STEAM GENERATOR.

No. 808,429. Patented Nov. 25, 1884.

(No Model.) 4 Sheets-Sheet 4.

0. D. ORVIS.

STEAMGENERATOR.

Patented NOV. 25, 1.884.'

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SPECIFICATION forming part of Letters Patent No. 308,429, dated November 25, 1884.

Application filed September :20, 1884. (No model.)

1"'0 all whom t may concern.-

Be it known that I, OREL D. ORvIs, of the city and county of N ew York, in the State of l New York, have invented ala new and useful l Improvement in Steam-Generators, of which l the following is a specification.

My invention relates to those generators in which are comprised a cylinder or multitubular boiler, a drum or hollow bridge, which is placed transversely at the back of the furnace and forms the top or a part of the bridge-wall and pipes or systems of pipes connecting the drum or hollow bridge with the steam and water spaces of the boiler proper.

My invention consists in the combination, with the boiler proper, of a conical drum or shell constituting a part of the bridge-wall, and made in the form of a frustum of a cone, a pipe or pipes connecting said drum or bridge with the steam-space of the boiler for conducting to the boiler the steam generated in said drum orbridge, and a pipe or pipes connecting the water-space of the boiler .with the drum or bridge for supplying water to said drum or bridge. The conical drum may be arranged in such position that its top or upper side will be truly horizontal and its bottom or under side inclined, in which case all mud and sediment will tend to the lower end of the dru1n;or the drum may be arranged or set with its bottoni or under side horizontal and all the inclination on the top or upper side, whereby the steam generated in the drum will be made to flow to the highest end thereof. It is very desirable, however, to afford provision both for the movement of mud and sediment toward one end ofthe drum and for the iiow of steam to the end of the drum; and to this end my invention also consists in the combination, with a boiler proper, of a conical drum or shell constitutinga part of the bridge-wall, and made in the form cfa frustum of a cone, and having its top and bottom both inclined, and pipes connecting the boiler proper and said drum or hollow bridge, and providing for the dow of water from the boiler proper to thedrum or bridge and the iiow of hotter water and steam from the drum or bridge to the boiler proper.

The invention also consists in the combinal tion, with a boiler proper, of a hollow bridge or drum constituting a part of the bridge-wall, a large pipe or water-leg, depending from the bottom of the boiler near its rear end and connected with the said hollow bridge or drum, and systems of pipes also extending from the bridge or drum and connected with the upper portion of the boiler near the front end thereof, and preferably Jthe steam-space therein.

The invention also consists in the combination, with a boiler proper, of a hollow bridge or drum constituting a part of the bridge-wall, a large pipe or water-leg depending from the bottom of the boiler near its rear end, and connected` with said hollow'bridge or drum, systems of pipes connecting the bridge or drum with the Lipper portion of the boiler, a blow-off pipe leading from said bridge or drum, and a pipe leading from the lower end` of the depending pipe or water-leg to the blow-off pipe.

The invention also consists in a combination, with a boiler proper, of a hollow bridge or drum constituting a part of the bridge-wall, a large pipe or water-leg depending from the bottom of the boiler near the rear end, pipes extending laterally from opposite sides of the water-leg and extending to the bridge or drum near opposite ends thereof, the water-leg being -prolonged below the laterally-extending pipes, systems of pipes connecting the hollow bridge or drinn with the front portion of the boiler, a blow-off pipe leading from the bridge or drum, and a pipe leading from the lower end of the large pipe or water-leg to the blowoff pipe.

The invention also consists in the combination,witli the boiler proper, the hollow bridge or drum, the depending water leg, and the pipes extending laterally therefrom and connected with the bridge or drun1,all as hereinabove described, of systems of pipes'connecting both the bridge or drum and the pipes extending to the bridge or drum from said ter-leg with the front portion ofthe boiler.

The invention also consists in other combinations of parts, hereinafter particularly described, and pointed out in the claims.

In the accompanying drawings, Figure lis a side view of my improved generator and a roo sectional view of the brick-setting thereof,the generator being represented as it would appear with one side wall entirely removed. Fig. 2 is a transverse vertical section on the irregular plane of the dotted line x w, Fig. 1. Fig. 3 is a transverse vertical section on the plane of the dotted line y y, Fig. l, looking rearward. Fig. 4 is a transverse vertical section on the plane of the dotted line ze, Fig. l, looking forward. Figs. 5 and 6 are transverse vertical sections similar to Fig. 3, showing diiferent arrangements of the hollow bridge or conical drum which constitutes a part of the bridge-wall, and Fig. 7 is a side elevation of a generator with the side wall removed as in Fig. l, showing a different arrangement of the systems of pipes which connect the hollow bridge or conical drum with the front portion of the boiler proper.

Similar letters of reference de signate corresponding parts in all the figures.

In all figures of the drawings, A designates the boiler proper, which is here shown as multitubular, and is provided with the usual steam-dome, A, and with lugs or knees a, whereby it is supported on the side walls, B B, of the brick setting.

C designates the furnace, and C the ash-pit, which are provided with the usual doors, bb, and D is the grate, at the back of which is the bridge-wall E, the top portion of which consists of a hollow bridge or drum, E. rlhis hollow bridge or drum has one distinguishing characteristic, namely, that it is conical or made in the form of the frustum of a cone, being considerably smaller in diameter at one end than at the other.

Behind the bridge-wallv E is the combustion chamber or space F, to which access may be had by a door, c, in the rear wall, B', of the setting. After passing forward through the tubes of the boiler the products of combustion enter the breecliing or front connection, G, and thence pass rearward on top of the boiler through the flue II and make their exit at the opening H, which leads to the smoke pipe or chimney.' Near the rear end of the boiler a large pipe or water-leg, I, depends from the bottom thereof.

Referring now more particularly to Figs. 1, 2, 3, 4, it will be seen that the frustum of a cone or conical drum, E', which forms the top portion of the bridgewall E, is set with its top or upper side horizontal from end to end, and with its taper all on the bottom or under side. Any sediment or mud will then tend toward the larger end of the drum, from which extends the blow-off pipe d, and may be got rid of by blowing oif. The blow-off pipe d extends to the front ofthe boiler, as here shown, and is there provided with the usual blow-off valve or cock d. As here shown, the depending pipe or water-leg I contains a crossfitting, I, and from opposite lateral branches thereof proceed pipes e, which are extended forward and connected with the bridge or conical drum E near its two ends, as is shown in Figs. l and 4. The water-leg I is prolonged beyond the pipes e, and with its lower end is connecteda blow-off pipe, d2, which enters the blow-off pipe d near the junction of the latter with the drum E. By means of the single blow-off connection d, I thus provide for blowing off both the bridge-drum E and the boiler proper, A, and the conical drum enables me to provide for blowing off the deposit at the larger end of the drum by setting the drum with its inclinati-on on the under side and permits of the upper side of the drum being horizontal, thus giving the saine heightV of bridge-wall at one end as the other. This re'sult cannot be attained with a cylindric drum set in an inclined position, for in that case the top or"upper side of the drum must have the same ^inclination as the bottom or under side thereof. The larger end of the drum E projects through one side wall, B, of the generator, and is exposed on the outside thereof, and the smaller end of saidr drum proj eets sufficiently into the op posite side wall to be afforded ample support. At the larger end the drum E is provided with the proper manhole f, and the feed-pipe f is also shown as entering that end of the said drum.

At the front of the boiler A, and on each side thereof, are headers J, which are con nected at their upper ends by pipes g with the steam-space or upper part of the boiler at the front thereof. As here shown, the headers are composed of cross-fittings united by nipples, and from each of them extend pipes or tubes J* J J2 J JL J5 J rlhe number of these pipes may be varied, as may be desired. As hereshown, thelowermost pipe, J ii, of each header extends direct to the drum E, near the end thereof. The next two pipes, J J2, are connected by suitable fittings with each other and` with the pipe J :ii The pipe J 3 has a downwardly-presented terminal portion, Jsii, and is connected with the top of the drum E, and the pipes J i J 5 JG have downwardly-presented terminal portions J 1* J5* J "if, and are connected with suitable T-fittings, ce1, in the two laterally-extending pipes c. The several pipes J J J, &c., are set at a considerable inclination, as will be observed, and hence the steam and highly-heated water are afforded an easy upward passage through them to the headers J, and thence through the headers and pipes g into the boiler proper, wherein the steam readily separates from the highly-heated wa# ter. It will be understood that a system of pipes J J J Z, &c., with header J is employed on each side of the boiler A.

I have here shown the branches ofthe crossttings in the headers J which are opposite the pipes J J i, &c., as closed by plugs, i1, and by removing these plugs a brush may be introduced through the pipes J J 2, 83e., for clearing them of scale.

From the foregoing description it will be understood that the system of pipes J J J IOO IIO

Src., being exposed to the hottest part of the fire, the circulation of water will be downward through the large pipe or water-leg I at the rear end of the boiler, where the heat is less intense, thence through the pipes c and to the drum E, and from the drum the water which enters from the pipes e, together with the feed-water and steam, pass through the pipes J* J J2 J3 direct tothe headers J, and thence into the steam space of the boiler. The pipes J* J5* J6* and JJ J's also offer an avenue of escape to the headers J of any water in the pipe c which tends to take that course and any steam generated in the pipes e or the pipes leading therefrom. The pipes J3 also serve for the passage of steam and most-highlyheated water from the drum E to the headers J and thence to the steam-space of the boiler. The direct heat to which the portion of the bottom of the boilerover the lire is exposed prevents the mud or sediment from there settling, and it settles in larger quantity near the rear end of the boiler. The water at the bottom of the boiler near the rear end is naturally cooler than itis over the fire, and hence the location of the large water-legI at the bottom of the boiler near the rear end thereof is advantageous, because the cooler water in its natural circulation downward through the water-leg I carries with it the mud and sediment which has settled near the rear end of the boiler. The transverse section shown in Fig. 5 corresponds in all respects to that in Fig. 3, except that in Fig. 5 the bridge-drum F has a greater taper than inthe figure before described, and has its axis nearly or quite horizontal, thereby making an inclination at both the upper and lower sides or top and bottom thereof. Thus I provide notonlyfor the movement of mud and sediment to the larger end of the drum, where the blow-oft' pipe d connects, but I also provide for the passage of steam toward the larger end of the drum,i'rom which it escapes through one of the systems of pipes J* J J, &c.

Fig. G represents the conical drum E', set with its bottom or under side approximately horizontal and the inclination at the upper side or top, thus providing for the iiow of steam generated in the drum to one end thereof, and whence it escapes by one of the sys- -J5 and a similar s stern is u )on each side of the generator. The lowermost pipe, J*, ex-

tends from the bottom of theheader J direct to the drum E, and the pipes JJ" are connected, as clearly shown, with each other and with the pipe J*. The pipes J3 J* J5 are connected by a suitable header, J 7, with the top of the drum E. In the operation of this generator the water passes downward through the large pipe or water-leg I and thence through the pipes e to the drum E, and steam which is generated in the drum or which enters it through the pipes e has a direct avenue of escape through the headers J7 and pipes J3 J4 J5 to thel headers J and the steam-space of the boiler proper. Highly heated water also passes from the drum E through the pipes J J, &c.. to the header J.

It is obvious that the number of the pipes J J J 2, &c.,may be varied as may be desired, as may also the size of the pipes.

In both arrangments of pipes shown in Figs. l and 7 the several pipes J* J, Src., are all inclined in the same direction, and hence water and steam pass through them separately and direct to the headers J; or,in other-words, the passages for the steam and water are not circuitous as when a number of pipes are arranged at reverse inclinations and connected so as to compel the waterand steam to traverse a long and circuitouspassage in passing from the bridge-drum to the boiler proper. Hence the circulation is much more vigorous and effective.

What I claim as my invention,and desire to secure by Letters Patent, is

1. The combination,with the boiler proper, of a conical d'rurn or shell constituting a part of the bridge-wall and made in the form ofa frnstum of a cone, and pipes connecting said hollow bridge or drum with the steam and water space of the boiler proper, substantially as and for the purpose herein described.

2. The combination, with the boiler proper, of a conical drum or shell constituting a part of the bridge-wall and made in the form of a i'rustum of a cone set with an inclination at its under side, pipes connecting said conical bridge or drum with the steam and water spaces of the boiler proper, and a blow-off pipe leading from the larger and lower end of said bridge or drum, substantially as and for the purpose herein described.

3. The combination,with the boiler proper, of a conical drum or shell constituting a part ofthe bridge-wall and made in the form of a frustum of a cone and set with an inclination at both top and bottom, pipes connecting said conical bridge or drum with the steam and water spaces of the boiler proper, and ablowoff pipe leading from the larger and lower end of said bridge or drum, substantially as and for the purpose herein described.

4. The combination,with the boiler proper, of ahollow bridge or drum constituting a part ot' the bridge-wall, a large pipe or'water-leg, I, depending from the bottom of the boiler near the rear end and connected with the said hollow bridge or drum, and systems of pipes extending from the said bridge or drum, and connected with the upper portion of the boiler near the front end thereof, whereby provision is afforded for the circulation of water from the rear part of the boiler down the said water-leg to the bridge-drum, and from said IOO IIO

drum through the systems of pipes into the front part of the boiler, substantially as herein described. y

5. The co1nbination,with a boiler proper, of a hollow bridge or drum constituting a part of the bridge-wall, a large pipe or water-leg depending from the bottom of the boiler near its rear end and connected with said hollow bridge or drum, systems of pipes connecting said bridge or drum with the upper portion of the boiler, a blow oif pipe leading from said bridge or drum, and a pipe leading from the lower part of the depending pipe or water-leg to said blow-oft` pipe, substantially as herein described.

6. rlhe combination, with the boiler proper, of a hollow bridge or drum constituting a part of the bridge-wall, a large pipe or water-leg depending from the bottom of the boiler near its rear end, pipes extending laterally froni the water-leg and leading to the bridge or drum near opposite ends thereof, the water-leg being prolonged below said laterally-extending pipes, pipes connecting the hollow bridge or druin with the front portion of the boiler, a blow-off pipe leading from the hollow bridge or drum, and a pipe leading from the lower end of said water-leg to the blow-oft' pipe, substantially as herein deor druin and the pipes leading thereto from l the front and top of the said conical bridge or drum, and headers J, receiving the pipes J i: J 85o., and connected with the upper front part of the boiler, substantially as herein dcscribed.

9. The eo1nbination,with the boiler proper, A, of the hollow bridge or drum E', pipes for supplying water thereto from the boiler, systeins of pipes J J J2, die., leading from the hollow bridge or drum, all at an upward inclination toward the front of the boiler, headers J, receiving the forward ends of said inclined pipes, and removable plugs in said headers opposite said inclined pipes, substantially as herein described.

10. The combination, with the boiler proper, A, of the hollow bridge or druin E, the depending` water-leg I, thc pipes e, leading from said water-leg to said bridge or druln, systems of pipes Jil: J J2 J3 J4, &c., extending from the bridge or drum E' and said pipes e, and all having an upward inclination toward the front of the boiler, and headers J, receiving said inclined pipes, and connected with the upper part of the boiler, substantially as herein described.

, OREL D. ORVIS. lVitnesses:

CHANDLER HALL, FREDK. HAYNns.

drum, pipes J il: J &c., leading forward from 

